GCP Professional Cloud Architect Practice Question

Cross-Cloud Interconnect creates a private, high-bandwidth (10 Gbps or 100 Gbps per link) physical connection between a Google Cloud VPC and another cloud provider's network, with routes exchanged dynamically through Cloud Router. Traffic remains on private links, and there is no dependence on the corporate data center or the public internet, so nightly 20 TB transfers complete predictably.

High Availability VPN relies on the public internet and requires ongoing tunnel management. Dedicated Interconnect and Partner Interconnect are intended for on-premises-to-Google Cloud scenarios; they would still force AWS traffic to detour through an on-prem location or a service-provider network, adding latency and operational complexity. Therefore, Cross-Cloud Interconnect is the most appropriate choice.